4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Common Internet FileSystem (CIFS) client
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* Note that BB means BUGBUG (ie something to fix eventually) */
26 #include <linux/module.h>
28 #include <linux/mount.h>
29 #include <linux/slab.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/seq_file.h>
33 #include <linux/vfs.h>
34 #include <linux/mempool.h>
35 #include <linux/delay.h>
36 #include <linux/kthread.h>
37 #include <linux/freezer.h>
40 #define DECLARE_GLOBALS_HERE
42 #include "cifsproto.h"
43 #include "cifs_debug.h"
44 #include "cifs_fs_sb.h"
46 #include <linux/key-type.h>
47 #include "cifs_spnego.h"
49 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
54 unsigned int oplockEnabled
= 1;
55 unsigned int experimEnabled
= 0;
56 unsigned int linuxExtEnabled
= 1;
57 unsigned int lookupCacheEnabled
= 1;
58 unsigned int multiuser_mount
= 0;
59 unsigned int global_secflags
= CIFSSEC_DEF
;
60 /* unsigned int ntlmv2_support = 0; */
61 unsigned int sign_CIFS_PDUs
= 1;
62 static const struct super_operations cifs_super_ops
;
63 unsigned int CIFSMaxBufSize
= CIFS_MAX_MSGSIZE
;
64 module_param(CIFSMaxBufSize
, int, 0);
65 MODULE_PARM_DESC(CIFSMaxBufSize
, "Network buffer size (not including header). "
66 "Default: 16384 Range: 8192 to 130048");
67 unsigned int cifs_min_rcv
= CIFS_MIN_RCV_POOL
;
68 module_param(cifs_min_rcv
, int, 0);
69 MODULE_PARM_DESC(cifs_min_rcv
, "Network buffers in pool. Default: 4 Range: "
71 unsigned int cifs_min_small
= 30;
72 module_param(cifs_min_small
, int, 0);
73 MODULE_PARM_DESC(cifs_min_small
, "Small network buffers in pool. Default: 30 "
75 unsigned int cifs_max_pending
= CIFS_MAX_REQ
;
76 module_param(cifs_max_pending
, int, 0);
77 MODULE_PARM_DESC(cifs_max_pending
, "Simultaneous requests to server. "
78 "Default: 50 Range: 2 to 256");
80 extern mempool_t
*cifs_sm_req_poolp
;
81 extern mempool_t
*cifs_req_poolp
;
82 extern mempool_t
*cifs_mid_poolp
;
85 cifs_read_super(struct super_block
*sb
, void *data
,
86 const char *devname
, int silent
)
89 struct cifs_sb_info
*cifs_sb
;
92 /* BB should we make this contingent on mount parm? */
93 sb
->s_flags
|= MS_NODIRATIME
| MS_NOATIME
;
94 sb
->s_fs_info
= kzalloc(sizeof(struct cifs_sb_info
), GFP_KERNEL
);
95 cifs_sb
= CIFS_SB(sb
);
99 rc
= bdi_setup_and_register(&cifs_sb
->bdi
, "cifs", BDI_CAP_MAP_COPY
);
105 #ifdef CONFIG_CIFS_DFS_UPCALL
106 /* copy mount params to sb for use in submounts */
107 /* BB: should we move this after the mount so we
108 * do not have to do the copy on failed mounts?
109 * BB: May be it is better to do simple copy before
110 * complex operation (mount), and in case of fail
111 * just exit instead of doing mount and attempting
112 * undo it if this copy fails?*/
114 int len
= strlen(data
);
115 cifs_sb
->mountdata
= kzalloc(len
+ 1, GFP_KERNEL
);
116 if (cifs_sb
->mountdata
== NULL
) {
117 bdi_destroy(&cifs_sb
->bdi
);
118 kfree(sb
->s_fs_info
);
119 sb
->s_fs_info
= NULL
;
122 strncpy(cifs_sb
->mountdata
, data
, len
+ 1);
123 cifs_sb
->mountdata
[len
] = '\0';
127 rc
= cifs_mount(sb
, cifs_sb
, data
, devname
);
131 cERROR(1, "cifs_mount failed w/return code = %d", rc
);
132 goto out_mount_failed
;
135 sb
->s_magic
= CIFS_MAGIC_NUMBER
;
136 sb
->s_op
= &cifs_super_ops
;
137 sb
->s_bdi
= &cifs_sb
->bdi
;
138 /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
140 cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
141 sb
->s_blocksize
= CIFS_MAX_MSGSIZE
;
142 sb
->s_blocksize_bits
= 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
143 inode
= cifs_root_iget(sb
, ROOT_I
);
151 sb
->s_root
= d_alloc_root(inode
);
158 #ifdef CONFIG_CIFS_EXPERIMENTAL
159 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
160 cFYI(1, "export ops supported");
161 sb
->s_export_op
= &cifs_export_ops
;
163 #endif /* EXPERIMENTAL */
168 cERROR(1, "cifs_read_super: get root inode failed");
172 cifs_umount(sb
, cifs_sb
);
176 #ifdef CONFIG_CIFS_DFS_UPCALL
177 if (cifs_sb
->mountdata
) {
178 kfree(cifs_sb
->mountdata
);
179 cifs_sb
->mountdata
= NULL
;
182 unload_nls(cifs_sb
->local_nls
);
183 bdi_destroy(&cifs_sb
->bdi
);
190 cifs_put_super(struct super_block
*sb
)
193 struct cifs_sb_info
*cifs_sb
;
195 cFYI(1, "In cifs_put_super");
196 cifs_sb
= CIFS_SB(sb
);
197 if (cifs_sb
== NULL
) {
198 cFYI(1, "Empty cifs superblock info passed to unmount");
202 rc
= cifs_umount(sb
, cifs_sb
);
204 cERROR(1, "cifs_umount failed with return code %d", rc
);
205 #ifdef CONFIG_CIFS_DFS_UPCALL
206 if (cifs_sb
->mountdata
) {
207 kfree(cifs_sb
->mountdata
);
208 cifs_sb
->mountdata
= NULL
;
212 unload_nls(cifs_sb
->local_nls
);
213 bdi_destroy(&cifs_sb
->bdi
);
218 cifs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
220 struct super_block
*sb
= dentry
->d_sb
;
221 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
222 struct cifsTconInfo
*tcon
= cifs_sb
->tcon
;
223 int rc
= -EOPNOTSUPP
;
228 buf
->f_type
= CIFS_MAGIC_NUMBER
;
231 * PATH_MAX may be too long - it would presumably be total path,
232 * but note that some servers (includinng Samba 3) have a shorter
235 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
237 buf
->f_namelen
= PATH_MAX
;
238 buf
->f_files
= 0; /* undefined */
239 buf
->f_ffree
= 0; /* unlimited */
242 * We could add a second check for a QFS Unix capability bit
244 if ((tcon
->ses
->capabilities
& CAP_UNIX
) &&
245 (CIFS_POSIX_EXTENSIONS
& le64_to_cpu(tcon
->fsUnixInfo
.Capability
)))
246 rc
= CIFSSMBQFSPosixInfo(xid
, tcon
, buf
);
249 * Only need to call the old QFSInfo if failed on newer one,
252 if (rc
&& (tcon
->ses
->capabilities
& CAP_NT_SMBS
))
253 rc
= CIFSSMBQFSInfo(xid
, tcon
, buf
);
256 * Some old Windows servers also do not support level 103, retry with
257 * older level one if old server failed the previous call or we
258 * bypassed it because we detected that this was an older LANMAN sess
261 rc
= SMBOldQFSInfo(xid
, tcon
, buf
);
267 static int cifs_permission(struct inode
*inode
, int mask
)
269 struct cifs_sb_info
*cifs_sb
;
271 cifs_sb
= CIFS_SB(inode
->i_sb
);
273 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_PERM
) {
274 if ((mask
& MAY_EXEC
) && !execute_ok(inode
))
278 } else /* file mode might have been restricted at mount time
279 on the client (above and beyond ACL on servers) for
280 servers which do not support setting and viewing mode bits,
281 so allowing client to check permissions is useful */
282 return generic_permission(inode
, mask
, NULL
);
285 static struct kmem_cache
*cifs_inode_cachep
;
286 static struct kmem_cache
*cifs_req_cachep
;
287 static struct kmem_cache
*cifs_mid_cachep
;
288 static struct kmem_cache
*cifs_sm_req_cachep
;
289 mempool_t
*cifs_sm_req_poolp
;
290 mempool_t
*cifs_req_poolp
;
291 mempool_t
*cifs_mid_poolp
;
293 static struct inode
*
294 cifs_alloc_inode(struct super_block
*sb
)
296 struct cifsInodeInfo
*cifs_inode
;
297 cifs_inode
= kmem_cache_alloc(cifs_inode_cachep
, GFP_KERNEL
);
300 cifs_inode
->cifsAttrs
= 0x20; /* default */
301 cifs_inode
->time
= 0;
302 cifs_inode
->write_behind_rc
= 0;
303 /* Until the file is open and we have gotten oplock
304 info back from the server, can not assume caching of
305 file data or metadata */
306 cifs_inode
->clientCanCacheRead
= false;
307 cifs_inode
->clientCanCacheAll
= false;
308 cifs_inode
->delete_pending
= false;
309 cifs_inode
->invalid_mapping
= false;
310 cifs_inode
->vfs_inode
.i_blkbits
= 14; /* 2**14 = CIFS_MAX_MSGSIZE */
311 cifs_inode
->server_eof
= 0;
313 /* Can not set i_flags here - they get immediately overwritten
314 to zero by the VFS */
315 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
316 INIT_LIST_HEAD(&cifs_inode
->openFileList
);
317 return &cifs_inode
->vfs_inode
;
321 cifs_destroy_inode(struct inode
*inode
)
323 kmem_cache_free(cifs_inode_cachep
, CIFS_I(inode
));
327 cifs_evict_inode(struct inode
*inode
)
329 truncate_inode_pages(&inode
->i_data
, 0);
330 end_writeback(inode
);
331 cifs_fscache_release_inode_cookie(inode
);
335 cifs_show_address(struct seq_file
*s
, struct TCP_Server_Info
*server
)
337 seq_printf(s
, ",addr=");
339 switch (server
->addr
.sockAddr
.sin_family
) {
341 seq_printf(s
, "%pI4", &server
->addr
.sockAddr
.sin_addr
.s_addr
);
344 seq_printf(s
, "%pI6",
345 &server
->addr
.sockAddr6
.sin6_addr
.s6_addr
);
346 if (server
->addr
.sockAddr6
.sin6_scope_id
)
347 seq_printf(s
, "%%%u",
348 server
->addr
.sockAddr6
.sin6_scope_id
);
351 seq_printf(s
, "(unknown)");
356 * cifs_show_options() is for displaying mount options in /proc/mounts.
357 * Not all settable options are displayed but most of the important
361 cifs_show_options(struct seq_file
*s
, struct vfsmount
*m
)
363 struct cifs_sb_info
*cifs_sb
= CIFS_SB(m
->mnt_sb
);
364 struct cifsTconInfo
*tcon
= cifs_sb
->tcon
;
366 seq_printf(s
, ",unc=%s", tcon
->treeName
);
367 if (tcon
->ses
->userName
)
368 seq_printf(s
, ",username=%s", tcon
->ses
->userName
);
369 if (tcon
->ses
->domainName
)
370 seq_printf(s
, ",domain=%s", tcon
->ses
->domainName
);
372 seq_printf(s
, ",uid=%d", cifs_sb
->mnt_uid
);
373 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
)
374 seq_printf(s
, ",forceuid");
376 seq_printf(s
, ",noforceuid");
378 seq_printf(s
, ",gid=%d", cifs_sb
->mnt_gid
);
379 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
)
380 seq_printf(s
, ",forcegid");
382 seq_printf(s
, ",noforcegid");
384 cifs_show_address(s
, tcon
->ses
->server
);
387 seq_printf(s
, ",file_mode=0%o,dir_mode=0%o",
388 cifs_sb
->mnt_file_mode
,
389 cifs_sb
->mnt_dir_mode
);
391 seq_printf(s
, ",seal");
393 seq_printf(s
, ",nocase");
395 seq_printf(s
, ",hard");
396 if (cifs_sb
->prepath
)
397 seq_printf(s
, ",prepath=%s", cifs_sb
->prepath
);
398 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
399 seq_printf(s
, ",posixpaths");
400 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SET_UID
)
401 seq_printf(s
, ",setuids");
402 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
403 seq_printf(s
, ",serverino");
404 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
405 seq_printf(s
, ",directio");
406 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_XATTR
)
407 seq_printf(s
, ",nouser_xattr");
408 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
409 seq_printf(s
, ",mapchars");
410 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
)
411 seq_printf(s
, ",sfu");
412 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
413 seq_printf(s
, ",nobrl");
414 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
415 seq_printf(s
, ",cifsacl");
416 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DYNPERM
)
417 seq_printf(s
, ",dynperm");
418 if (m
->mnt_sb
->s_flags
& MS_POSIXACL
)
419 seq_printf(s
, ",acl");
421 seq_printf(s
, ",rsize=%d", cifs_sb
->rsize
);
422 seq_printf(s
, ",wsize=%d", cifs_sb
->wsize
);
427 static void cifs_umount_begin(struct super_block
*sb
)
429 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
430 struct cifsTconInfo
*tcon
;
435 tcon
= cifs_sb
->tcon
;
439 read_lock(&cifs_tcp_ses_lock
);
440 if ((tcon
->tc_count
> 1) || (tcon
->tidStatus
== CifsExiting
)) {
441 /* we have other mounts to same share or we have
442 already tried to force umount this and woken up
443 all waiting network requests, nothing to do */
444 read_unlock(&cifs_tcp_ses_lock
);
446 } else if (tcon
->tc_count
== 1)
447 tcon
->tidStatus
= CifsExiting
;
448 read_unlock(&cifs_tcp_ses_lock
);
450 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
451 /* cancel_notify_requests(tcon); */
452 if (tcon
->ses
&& tcon
->ses
->server
) {
453 cFYI(1, "wake up tasks now - umount begin not complete");
454 wake_up_all(&tcon
->ses
->server
->request_q
);
455 wake_up_all(&tcon
->ses
->server
->response_q
);
456 msleep(1); /* yield */
457 /* we have to kick the requests once more */
458 wake_up_all(&tcon
->ses
->server
->response_q
);
465 #ifdef CONFIG_CIFS_STATS2
466 static int cifs_show_stats(struct seq_file
*s
, struct vfsmount
*mnt
)
473 static int cifs_remount(struct super_block
*sb
, int *flags
, char *data
)
475 *flags
|= MS_NODIRATIME
;
479 static int cifs_drop_inode(struct inode
*inode
)
481 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
483 /* no serverino => unconditional eviction */
484 return !(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) ||
485 generic_drop_inode(inode
);
488 static const struct super_operations cifs_super_ops
= {
489 .put_super
= cifs_put_super
,
490 .statfs
= cifs_statfs
,
491 .alloc_inode
= cifs_alloc_inode
,
492 .destroy_inode
= cifs_destroy_inode
,
493 .drop_inode
= cifs_drop_inode
,
494 .evict_inode
= cifs_evict_inode
,
495 /* .delete_inode = cifs_delete_inode, */ /* Do not need above
496 function unless later we add lazy close of inodes or unless the
497 kernel forgets to call us with the same number of releases (closes)
499 .show_options
= cifs_show_options
,
500 .umount_begin
= cifs_umount_begin
,
501 .remount_fs
= cifs_remount
,
502 #ifdef CONFIG_CIFS_STATS2
503 .show_stats
= cifs_show_stats
,
508 cifs_get_sb(struct file_system_type
*fs_type
,
509 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
512 struct super_block
*sb
;
514 sb
= sget(fs_type
, NULL
, set_anon_super
, NULL
);
516 cFYI(1, "Devname: %s flags: %d ", dev_name
, flags
);
523 rc
= cifs_read_super(sb
, data
, dev_name
, flags
& MS_SILENT
? 1 : 0);
525 deactivate_locked_super(sb
);
528 sb
->s_flags
|= MS_ACTIVE
;
529 simple_set_mnt(mnt
, sb
);
533 static ssize_t
cifs_file_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
534 unsigned long nr_segs
, loff_t pos
)
536 struct inode
*inode
= iocb
->ki_filp
->f_path
.dentry
->d_inode
;
539 written
= generic_file_aio_write(iocb
, iov
, nr_segs
, pos
);
540 if (!CIFS_I(inode
)->clientCanCacheAll
)
541 filemap_fdatawrite(inode
->i_mapping
);
545 static loff_t
cifs_llseek(struct file
*file
, loff_t offset
, int origin
)
547 /* origin == SEEK_END => we must revalidate the cached file length */
548 if (origin
== SEEK_END
) {
551 /* some applications poll for the file length in this strange
552 way so we must seek to end on non-oplocked files by
553 setting the revalidate time to zero */
554 CIFS_I(file
->f_path
.dentry
->d_inode
)->time
= 0;
556 retval
= cifs_revalidate_file(file
);
558 return (loff_t
)retval
;
560 return generic_file_llseek_unlocked(file
, offset
, origin
);
563 static int cifs_setlease(struct file
*file
, long arg
, struct file_lock
**lease
)
565 /* note that this is called by vfs setlease with lock_flocks held
566 to protect *lease from going away */
567 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
569 if (!(S_ISREG(inode
->i_mode
)))
572 /* check if file is oplocked */
573 if (((arg
== F_RDLCK
) &&
574 (CIFS_I(inode
)->clientCanCacheRead
)) ||
576 (CIFS_I(inode
)->clientCanCacheAll
)))
577 return generic_setlease(file
, arg
, lease
);
578 else if (CIFS_SB(inode
->i_sb
)->tcon
->local_lease
&&
579 !CIFS_I(inode
)->clientCanCacheRead
)
580 /* If the server claims to support oplock on this
581 file, then we still need to check oplock even
582 if the local_lease mount option is set, but there
583 are servers which do not support oplock for which
584 this mount option may be useful if the user
585 knows that the file won't be changed on the server
587 return generic_setlease(file
, arg
, lease
);
592 struct file_system_type cifs_fs_type
= {
593 .owner
= THIS_MODULE
,
595 .get_sb
= cifs_get_sb
,
596 .kill_sb
= kill_anon_super
,
599 const struct inode_operations cifs_dir_inode_ops
= {
600 .create
= cifs_create
,
601 .lookup
= cifs_lookup
,
602 .getattr
= cifs_getattr
,
603 .unlink
= cifs_unlink
,
604 .link
= cifs_hardlink
,
607 .rename
= cifs_rename
,
608 .permission
= cifs_permission
,
609 /* revalidate:cifs_revalidate, */
610 .setattr
= cifs_setattr
,
611 .symlink
= cifs_symlink
,
613 #ifdef CONFIG_CIFS_XATTR
614 .setxattr
= cifs_setxattr
,
615 .getxattr
= cifs_getxattr
,
616 .listxattr
= cifs_listxattr
,
617 .removexattr
= cifs_removexattr
,
621 const struct inode_operations cifs_file_inode_ops
= {
622 /* revalidate:cifs_revalidate, */
623 .setattr
= cifs_setattr
,
624 .getattr
= cifs_getattr
, /* do we need this anymore? */
625 .rename
= cifs_rename
,
626 .permission
= cifs_permission
,
627 #ifdef CONFIG_CIFS_XATTR
628 .setxattr
= cifs_setxattr
,
629 .getxattr
= cifs_getxattr
,
630 .listxattr
= cifs_listxattr
,
631 .removexattr
= cifs_removexattr
,
635 const struct inode_operations cifs_symlink_inode_ops
= {
636 .readlink
= generic_readlink
,
637 .follow_link
= cifs_follow_link
,
638 .put_link
= cifs_put_link
,
639 .permission
= cifs_permission
,
640 /* BB add the following two eventually */
641 /* revalidate: cifs_revalidate,
642 setattr: cifs_notify_change, *//* BB do we need notify change */
643 #ifdef CONFIG_CIFS_XATTR
644 .setxattr
= cifs_setxattr
,
645 .getxattr
= cifs_getxattr
,
646 .listxattr
= cifs_listxattr
,
647 .removexattr
= cifs_removexattr
,
651 const struct file_operations cifs_file_ops
= {
652 .read
= do_sync_read
,
653 .write
= do_sync_write
,
654 .aio_read
= generic_file_aio_read
,
655 .aio_write
= cifs_file_aio_write
,
657 .release
= cifs_close
,
661 .mmap
= cifs_file_mmap
,
662 .splice_read
= generic_file_splice_read
,
663 .llseek
= cifs_llseek
,
664 #ifdef CONFIG_CIFS_POSIX
665 .unlocked_ioctl
= cifs_ioctl
,
666 #endif /* CONFIG_CIFS_POSIX */
667 .setlease
= cifs_setlease
,
670 const struct file_operations cifs_file_direct_ops
= {
671 /* no aio, no readv -
672 BB reevaluate whether they can be done with directio, no cache */
673 .read
= cifs_user_read
,
674 .write
= cifs_user_write
,
676 .release
= cifs_close
,
680 .mmap
= cifs_file_mmap
,
681 .splice_read
= generic_file_splice_read
,
682 #ifdef CONFIG_CIFS_POSIX
683 .unlocked_ioctl
= cifs_ioctl
,
684 #endif /* CONFIG_CIFS_POSIX */
685 .llseek
= cifs_llseek
,
686 .setlease
= cifs_setlease
,
688 const struct file_operations cifs_file_nobrl_ops
= {
689 .read
= do_sync_read
,
690 .write
= do_sync_write
,
691 .aio_read
= generic_file_aio_read
,
692 .aio_write
= cifs_file_aio_write
,
694 .release
= cifs_close
,
697 .mmap
= cifs_file_mmap
,
698 .splice_read
= generic_file_splice_read
,
699 .llseek
= cifs_llseek
,
700 #ifdef CONFIG_CIFS_POSIX
701 .unlocked_ioctl
= cifs_ioctl
,
702 #endif /* CONFIG_CIFS_POSIX */
703 .setlease
= cifs_setlease
,
706 const struct file_operations cifs_file_direct_nobrl_ops
= {
707 /* no mmap, no aio, no readv -
708 BB reevaluate whether they can be done with directio, no cache */
709 .read
= cifs_user_read
,
710 .write
= cifs_user_write
,
712 .release
= cifs_close
,
715 .mmap
= cifs_file_mmap
,
716 .splice_read
= generic_file_splice_read
,
717 #ifdef CONFIG_CIFS_POSIX
718 .unlocked_ioctl
= cifs_ioctl
,
719 #endif /* CONFIG_CIFS_POSIX */
720 .llseek
= cifs_llseek
,
721 .setlease
= cifs_setlease
,
724 const struct file_operations cifs_dir_ops
= {
725 .readdir
= cifs_readdir
,
726 .release
= cifs_closedir
,
727 .read
= generic_read_dir
,
728 .unlocked_ioctl
= cifs_ioctl
,
729 .llseek
= generic_file_llseek
,
733 cifs_init_once(void *inode
)
735 struct cifsInodeInfo
*cifsi
= inode
;
737 inode_init_once(&cifsi
->vfs_inode
);
738 INIT_LIST_HEAD(&cifsi
->lockList
);
742 cifs_init_inodecache(void)
744 cifs_inode_cachep
= kmem_cache_create("cifs_inode_cache",
745 sizeof(struct cifsInodeInfo
),
746 0, (SLAB_RECLAIM_ACCOUNT
|
749 if (cifs_inode_cachep
== NULL
)
756 cifs_destroy_inodecache(void)
758 kmem_cache_destroy(cifs_inode_cachep
);
762 cifs_init_request_bufs(void)
764 if (CIFSMaxBufSize
< 8192) {
765 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
766 Unicode path name has to fit in any SMB/CIFS path based frames */
767 CIFSMaxBufSize
= 8192;
768 } else if (CIFSMaxBufSize
> 1024*127) {
769 CIFSMaxBufSize
= 1024 * 127;
771 CIFSMaxBufSize
&= 0x1FE00; /* Round size to even 512 byte mult*/
773 /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
774 cifs_req_cachep
= kmem_cache_create("cifs_request",
776 MAX_CIFS_HDR_SIZE
, 0,
777 SLAB_HWCACHE_ALIGN
, NULL
);
778 if (cifs_req_cachep
== NULL
)
781 if (cifs_min_rcv
< 1)
783 else if (cifs_min_rcv
> 64) {
785 cERROR(1, "cifs_min_rcv set to maximum (64)");
788 cifs_req_poolp
= mempool_create_slab_pool(cifs_min_rcv
,
791 if (cifs_req_poolp
== NULL
) {
792 kmem_cache_destroy(cifs_req_cachep
);
795 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
796 almost all handle based requests (but not write response, nor is it
797 sufficient for path based requests). A smaller size would have
798 been more efficient (compacting multiple slab items on one 4k page)
799 for the case in which debug was on, but this larger size allows
800 more SMBs to use small buffer alloc and is still much more
801 efficient to alloc 1 per page off the slab compared to 17K (5page)
802 alloc of large cifs buffers even when page debugging is on */
803 cifs_sm_req_cachep
= kmem_cache_create("cifs_small_rq",
804 MAX_CIFS_SMALL_BUFFER_SIZE
, 0, SLAB_HWCACHE_ALIGN
,
806 if (cifs_sm_req_cachep
== NULL
) {
807 mempool_destroy(cifs_req_poolp
);
808 kmem_cache_destroy(cifs_req_cachep
);
812 if (cifs_min_small
< 2)
814 else if (cifs_min_small
> 256) {
815 cifs_min_small
= 256;
816 cFYI(1, "cifs_min_small set to maximum (256)");
819 cifs_sm_req_poolp
= mempool_create_slab_pool(cifs_min_small
,
822 if (cifs_sm_req_poolp
== NULL
) {
823 mempool_destroy(cifs_req_poolp
);
824 kmem_cache_destroy(cifs_req_cachep
);
825 kmem_cache_destroy(cifs_sm_req_cachep
);
833 cifs_destroy_request_bufs(void)
835 mempool_destroy(cifs_req_poolp
);
836 kmem_cache_destroy(cifs_req_cachep
);
837 mempool_destroy(cifs_sm_req_poolp
);
838 kmem_cache_destroy(cifs_sm_req_cachep
);
844 cifs_mid_cachep
= kmem_cache_create("cifs_mpx_ids",
845 sizeof(struct mid_q_entry
), 0,
846 SLAB_HWCACHE_ALIGN
, NULL
);
847 if (cifs_mid_cachep
== NULL
)
850 /* 3 is a reasonable minimum number of simultaneous operations */
851 cifs_mid_poolp
= mempool_create_slab_pool(3, cifs_mid_cachep
);
852 if (cifs_mid_poolp
== NULL
) {
853 kmem_cache_destroy(cifs_mid_cachep
);
861 cifs_destroy_mids(void)
863 mempool_destroy(cifs_mid_poolp
);
864 kmem_cache_destroy(cifs_mid_cachep
);
872 INIT_LIST_HEAD(&cifs_tcp_ses_list
);
873 #ifdef CONFIG_CIFS_EXPERIMENTAL
874 INIT_LIST_HEAD(&GlobalDnotifyReqList
);
875 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q
);
878 * Initialize Global counters
880 atomic_set(&sesInfoAllocCount
, 0);
881 atomic_set(&tconInfoAllocCount
, 0);
882 atomic_set(&tcpSesAllocCount
, 0);
883 atomic_set(&tcpSesReconnectCount
, 0);
884 atomic_set(&tconInfoReconnectCount
, 0);
886 atomic_set(&bufAllocCount
, 0);
887 atomic_set(&smBufAllocCount
, 0);
888 #ifdef CONFIG_CIFS_STATS2
889 atomic_set(&totBufAllocCount
, 0);
890 atomic_set(&totSmBufAllocCount
, 0);
891 #endif /* CONFIG_CIFS_STATS2 */
893 atomic_set(&midCount
, 0);
894 GlobalCurrentXid
= 0;
895 GlobalTotalActiveXid
= 0;
896 GlobalMaxActiveXid
= 0;
897 memset(Local_System_Name
, 0, 15);
898 rwlock_init(&GlobalSMBSeslock
);
899 rwlock_init(&cifs_tcp_ses_lock
);
900 spin_lock_init(&GlobalMid_Lock
);
902 if (cifs_max_pending
< 2) {
903 cifs_max_pending
= 2;
904 cFYI(1, "cifs_max_pending set to min of 2");
905 } else if (cifs_max_pending
> 256) {
906 cifs_max_pending
= 256;
907 cFYI(1, "cifs_max_pending set to max of 256");
910 rc
= cifs_fscache_register();
914 rc
= cifs_init_inodecache();
918 rc
= cifs_init_mids();
920 goto out_destroy_inodecache
;
922 rc
= cifs_init_request_bufs();
924 goto out_destroy_mids
;
926 rc
= register_filesystem(&cifs_fs_type
);
928 goto out_destroy_request_bufs
;
929 #ifdef CONFIG_CIFS_UPCALL
930 rc
= register_key_type(&cifs_spnego_key_type
);
932 goto out_unregister_filesystem
;
937 #ifdef CONFIG_CIFS_UPCALL
938 out_unregister_filesystem
:
939 unregister_filesystem(&cifs_fs_type
);
941 out_destroy_request_bufs
:
942 cifs_destroy_request_bufs();
945 out_destroy_inodecache
:
946 cifs_destroy_inodecache();
949 cifs_fscache_unregister();
957 cFYI(DBG2
, "exit_cifs");
959 cifs_fscache_unregister();
960 #ifdef CONFIG_CIFS_DFS_UPCALL
961 cifs_dfs_release_automount_timer();
963 #ifdef CONFIG_CIFS_UPCALL
964 unregister_key_type(&cifs_spnego_key_type
);
966 unregister_filesystem(&cifs_fs_type
);
967 cifs_destroy_inodecache();
969 cifs_destroy_request_bufs();
972 MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
973 MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
975 ("VFS to access servers complying with the SNIA CIFS Specification "
976 "e.g. Samba and Windows");
977 MODULE_VERSION(CIFS_VERSION
);
978 module_init(init_cifs
)
979 module_exit(exit_cifs
)